2 * firewall3 - 3rd OpenWrt UCI firewall implementation
4 * Copyright (C) 2013 Jo-Philipp Wich <jow@openwrt.org>
6 * Permission to use, copy, modify, and/or distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
21 const char *fw3_flag_names[FW3_DEFAULT_DROP_INVALID + 1] = {
39 fw3_parse_bool(void *ptr, const char *val)
41 if (!strcmp(val, "true") || !strcmp(val, "yes") || !strcmp(val, "1"))
42 *((bool *)ptr) = true;
44 *((bool *)ptr) = false;
50 fw3_parse_int(void *ptr, const char *val)
52 int n = strtol(val, NULL, 10);
54 if (errno == ERANGE || errno == EINVAL)
63 fw3_parse_string(void *ptr, const char *val)
65 *((char **)ptr) = (char *)val;
70 fw3_parse_target(void *ptr, const char *val)
72 if (!strcmp(val, "ACCEPT"))
74 *((enum fw3_target *)ptr) = FW3_TARGET_ACCEPT;
77 else if (!strcmp(val, "REJECT"))
79 *((enum fw3_target *)ptr) = FW3_TARGET_REJECT;
82 else if (!strcmp(val, "DROP"))
84 *((enum fw3_target *)ptr) = FW3_TARGET_DROP;
87 else if (!strcmp(val, "NOTRACK"))
89 *((enum fw3_target *)ptr) = FW3_TARGET_NOTRACK;
92 else if (!strcmp(val, "DNAT"))
94 *((enum fw3_target *)ptr) = FW3_TARGET_DNAT;
97 else if (!strcmp(val, "SNAT"))
99 *((enum fw3_target *)ptr) = FW3_TARGET_SNAT;
107 fw3_parse_limit(void *ptr, const char *val)
109 struct fw3_limit *limit = ptr;
110 enum fw3_limit_unit u = FW3_LIMIT_UNIT_SECOND;
116 limit->invert = true;
117 while (isspace(*++val));
120 n = strtol(val, &e, 10);
122 if (errno == ERANGE || errno == EINVAL)
125 if (*e && *e++ != '/')
131 if (!strncmp(e, "second", strlen(e)))
132 u = FW3_LIMIT_UNIT_SECOND;
133 else if (!strncmp(e, "minute", strlen(e)))
134 u = FW3_LIMIT_UNIT_MINUTE;
135 else if (!strncmp(e, "hour", strlen(e)))
136 u = FW3_LIMIT_UNIT_HOUR;
137 else if (!strncmp(e, "day", strlen(e)))
138 u = FW3_LIMIT_UNIT_DAY;
149 fw3_parse_device(void *ptr, const char *val)
151 struct fw3_device *dev = ptr;
163 while (isspace(*++val));
167 snprintf(dev->name, sizeof(dev->name), "%s", val);
176 fw3_parse_address(void *ptr, const char *val)
178 struct fw3_address *addr = ptr;
187 while (isspace(*++val));
195 if ((p = strchr(s, '/')) != NULL)
198 m = strtoul(p, &e, 10);
200 if ((e == p) || (*e != 0))
202 if (strchr(s, ':') || !inet_pton(AF_INET, p, &v4))
208 for (i = 0, m = 32; !(v4.s_addr & 1) && (i < 32); i++)
215 else if ((p = strchr(s, '-')) != NULL)
219 if (inet_pton(AF_INET6, p, &v6))
221 addr->family = FW3_FAMILY_V6;
222 addr->address2.v6 = v6;
225 else if (inet_pton(AF_INET, p, &v4))
227 addr->family = FW3_FAMILY_V4;
228 addr->address2.v4 = v4;
238 if (inet_pton(AF_INET6, s, &v6))
240 addr->family = FW3_FAMILY_V6;
241 addr->address.v6 = v6;
242 addr->mask = (m >= 0) ? m : 128;
244 else if (inet_pton(AF_INET, s, &v4))
246 addr->family = FW3_FAMILY_V4;
247 addr->address.v4 = v4;
248 addr->mask = (m >= 0) ? m : 32;
262 fw3_parse_mac(void *ptr, const char *val)
264 struct fw3_mac *addr = ptr;
265 struct ether_addr *mac;
270 while (isspace(*++val));
273 if ((mac = ether_aton(val)) != NULL)
284 fw3_parse_port(void *ptr, const char *val)
286 struct fw3_port *range = ptr;
293 range->invert = true;
294 while (isspace(*++val));
297 n = strtoul(val, &p, 10);
299 if (errno == ERANGE || errno == EINVAL)
302 if (*p && *p != '-' && *p != ':')
307 m = strtoul(++p, NULL, 10);
309 if (errno == ERANGE || errno == EINVAL || m < n)
326 fw3_parse_family(void *ptr, const char *val)
328 if (!strcmp(val, "any"))
329 *((enum fw3_family *)ptr) = FW3_FAMILY_ANY;
330 else if (!strcmp(val, "inet") || strrchr(val, '4'))
331 *((enum fw3_family *)ptr) = FW3_FAMILY_V4;
332 else if (!strcmp(val, "inet6") || strrchr(val, '6'))
333 *((enum fw3_family *)ptr) = FW3_FAMILY_V6;
341 fw3_parse_icmptype(void *ptr, const char *val)
343 struct fw3_icmptype *icmp = ptr;
349 for (i = 0; i < ARRAY_SIZE(fw3_icmptype_list_v4); i++)
351 if (!strcmp(val, fw3_icmptype_list_v4[i].name))
353 icmp->type = fw3_icmptype_list_v4[i].type;
354 icmp->code_min = fw3_icmptype_list_v4[i].code_min;
355 icmp->code_max = fw3_icmptype_list_v4[i].code_max;
362 for (i = 0; i < ARRAY_SIZE(fw3_icmptype_list_v6); i++)
364 if (!strcmp(val, fw3_icmptype_list_v6[i].name))
366 icmp->type6 = fw3_icmptype_list_v6[i].type;
367 icmp->code6_min = fw3_icmptype_list_v6[i].code_min;
368 icmp->code6_max = fw3_icmptype_list_v6[i].code_max;
377 i = strtoul(val, &p, 10);
379 if ((p == val) || (*p != '/' && *p != 0) || (i > 0xFF))
387 i = strtoul(val, &p, 10);
389 if ((p == val) || (*p != 0) || (i > 0xFF))
398 icmp->code_max = 0xFF;
401 icmp->type6 = icmp->type;
402 icmp->code6_min = icmp->code_max;
403 icmp->code6_max = icmp->code_max;
409 icmp->family = (v4 && v6) ? FW3_FAMILY_ANY
410 : (v6 ? FW3_FAMILY_V6 : FW3_FAMILY_V4);
416 fw3_parse_protocol(void *ptr, const char *val)
418 struct fw3_protocol *proto = ptr;
419 struct protoent *ent;
423 proto->invert = true;
424 while (isspace(*++val));
427 if (!strcmp(val, "all"))
432 else if (!strcmp(val, "icmpv6"))
437 ent = getprotobyname(val);
441 proto->protocol = ent->p_proto;
445 proto->protocol = strtoul(val, NULL, 10);
446 return (errno != ERANGE && errno != EINVAL);
450 fw3_parse_ipset_method(void *ptr, const char *val)
452 if (!strncmp(val, "bitmap", strlen(val)))
454 *((enum fw3_ipset_method *)ptr) = FW3_IPSET_METHOD_BITMAP;
457 else if (!strncmp(val, "hash", strlen(val)))
459 *((enum fw3_ipset_method *)ptr) = FW3_IPSET_METHOD_HASH;
462 else if (!strncmp(val, "list", strlen(val)))
464 *((enum fw3_ipset_method *)ptr) = FW3_IPSET_METHOD_LIST;
472 fw3_parse_ipset_datatype(void *ptr, const char *val)
474 struct fw3_ipset_datatype *type = ptr;
476 if (!strncmp(val, "dest_", 5))
481 else if (!strncmp(val, "dst_", 4))
486 else if (!strncmp(val, "src_", 4))
492 if (!strncmp(val, "ip", strlen(val)))
494 type->type = FW3_IPSET_TYPE_IP;
497 else if (!strncmp(val, "port", strlen(val)))
499 type->type = FW3_IPSET_TYPE_PORT;
502 else if (!strncmp(val, "mac", strlen(val)))
504 type->type = FW3_IPSET_TYPE_MAC;
507 else if (!strncmp(val, "net", strlen(val)))
509 type->type = FW3_IPSET_TYPE_NET;
512 else if (!strncmp(val, "set", strlen(val)))
514 type->type = FW3_IPSET_TYPE_SET;
523 fw3_parse_options(void *s, const struct fw3_option *opts,
524 struct uci_section *section)
528 struct uci_element *e, *l;
529 struct uci_option *o;
530 const struct fw3_option *opt;
531 struct list_head *item;
532 struct list_head *dest;
534 uci_foreach_element(§ion->options, e)
536 o = uci_to_option(e);
539 for (opt = opts; opt->name; opt++)
544 if (strcmp(opt->name, e->name))
547 if (o->type == UCI_TYPE_LIST)
551 warn_elem(e, "must not be a list");
555 uci_foreach_element(&o->v.list, l)
560 item = malloc(opt->elem_size);
565 memset(item, 0, opt->elem_size);
567 if (!opt->parse(item, l->name))
569 warn_elem(e, "has invalid value '%s'", l->name);
574 dest = (struct list_head *)((char *)s + opt->offset);
575 list_add_tail(item, dest);
586 if (!opt->parse((char *)s + opt->offset, o->v.string))
587 warn_elem(e, "has invalid value '%s'", o->v.string);
591 for (p = strtok(o->v.string, " \t");
593 p = strtok(NULL, " \t"))
595 item = malloc(opt->elem_size);
600 memset(item, 0, opt->elem_size);
602 if (!opt->parse(item, p))
604 warn_elem(e, "has invalid value '%s'", p);
609 dest = (struct list_head *)((char *)s + opt->offset);
610 list_add_tail(item, dest);
620 warn_elem(e, "is unknown");
626 fw3_format_in_out(struct fw3_device *in, struct fw3_device *out)
629 fw3_pr(" %s-i %s", in->invert ? "! " : "", in->name);
631 if (out && !out->any)
632 fw3_pr(" %s-o %s", out->invert ? "! " : "", out->name);
636 fw3_format_src_dest(struct fw3_address *src, struct fw3_address *dest)
638 char s[INET6_ADDRSTRLEN];
640 if ((src && src->range) || (dest && dest->range))
641 fw3_pr(" -m iprange");
647 inet_ntop(src->family == FW3_FAMILY_V4 ? AF_INET : AF_INET6,
648 &src->address.v4, s, sizeof(s));
650 fw3_pr(" %s--src-range %s", src->invert ? "! " : "", s);
652 inet_ntop(src->family == FW3_FAMILY_V4 ? AF_INET : AF_INET6,
653 &src->address2.v4, s, sizeof(s));
659 inet_ntop(src->family == FW3_FAMILY_V4 ? AF_INET : AF_INET6,
660 &src->address.v4, s, sizeof(s));
662 fw3_pr(" %s-s %s/%u", src->invert ? "! " : "", s, src->mask);
666 if (dest && dest->set)
670 inet_ntop(dest->family == FW3_FAMILY_V4 ? AF_INET : AF_INET6,
671 &dest->address.v4, s, sizeof(s));
673 fw3_pr(" %s--dst-range %s", dest->invert ? "! " : "", s);
675 inet_ntop(dest->family == FW3_FAMILY_V4 ? AF_INET : AF_INET6,
676 &dest->address2.v4, s, sizeof(s));
682 inet_ntop(dest->family == FW3_FAMILY_V4 ? AF_INET : AF_INET6,
683 &dest->address.v4, s, sizeof(s));
685 fw3_pr(" %s-d %s/%u", dest->invert ? "! " : "", s, dest->mask);
691 fw3_format_sport_dport(struct fw3_port *sp, struct fw3_port *dp)
695 if (sp->port_min == sp->port_max)
696 fw3_pr(" %s--sport %u", sp->invert ? "! " : "", sp->port_min);
698 fw3_pr(" %s--sport %u:%u",
699 sp->invert ? "! " : "", sp->port_min, sp->port_max);
704 if (dp->port_min == dp->port_max)
705 fw3_pr(" %s--dport %u", dp->invert ? "! " : "", dp->port_min);
707 fw3_pr(" %s--dport %u:%u",
708 dp->invert ? "! " : "", dp->port_min, dp->port_max);
713 fw3_format_mac(struct fw3_mac *mac)
718 fw3_pr(" -m mac %s--mac-source %s",
719 mac->invert ? "! " : "", ether_ntoa(&mac->mac));
723 fw3_format_protocol(struct fw3_protocol *proto, enum fw3_family family)
730 pr = proto->protocol;
732 if (pr == 1 && family == FW3_FAMILY_V6)
738 fw3_pr(" %s-p %u", proto->invert ? "! " : "", pr);
742 fw3_format_icmptype(struct fw3_icmptype *icmp, enum fw3_family family)
747 if (family != FW3_FAMILY_V6)
749 if (icmp->code_min == 0 && icmp->code_max == 0xFF)
750 fw3_pr(" %s--icmp-type %u", icmp->invert ? "! " : "", icmp->type);
752 fw3_pr(" %s--icmp-type %u/%u",
753 icmp->invert ? "! " : "", icmp->type, icmp->code_min);
757 if (icmp->code6_min == 0 && icmp->code6_max == 0xFF)
758 fw3_pr(" %s--icmpv6-type %u", icmp->invert ? "! " : "", icmp->type6);
760 fw3_pr(" %s--icmpv6-type %u/%u",
761 icmp->invert ? "! " : "", icmp->type6, icmp->code6_min);
766 fw3_format_limit(struct fw3_limit *limit)
771 const char *units[] = {
772 [FW3_LIMIT_UNIT_SECOND] = "second",
773 [FW3_LIMIT_UNIT_MINUTE] = "minute",
774 [FW3_LIMIT_UNIT_HOUR] = "hour",
775 [FW3_LIMIT_UNIT_DAY] = "day",
780 fw3_pr(" -m limit %s--limit %u/%s",
781 limit->invert ? "! " : "", limit->rate, units[limit->unit]);
783 if (limit->burst > 0)
784 fw3_pr(" --limit-burst %u", limit->burst);
789 fw3_format_ipset(struct fw3_ipset *ipset, bool invert)
792 const char *name = NULL;
793 struct fw3_ipset_datatype *type;
798 if (ipset->external && *ipset->external)
799 name = ipset->external;
803 fw3_pr(" -m set %s--match-set %s", invert ? "! " : "", name);
805 list_for_each_entry(type, &ipset->datatypes, list)
807 fw3_pr("%c%s", first ? ' ' : ',', type->dest ? "dst" : "src");
813 __fw3_format_comment(const char *comment, ...)
819 if (!comment || !*comment)
822 fw3_pr(" -m comment --comment \"");
826 va_start(ap, comment);
852 c = va_arg(ap, const char *);
862 fw3_format_extra(const char *extra)
864 if (!extra || !*extra)
867 fw3_pr(" %s", extra);